Convert a dose into the exact number of units to draw, for any vial concentration and either syringe standard. Straightforward arithmetic that is easy to get wrong at two in the morning.
Educational tool only. Not medical advice. Always verify doses independently before use.
Your injection volume is the dose divided by the concentration. Units are that volume multiplied by the syringe standard, one hundred for U-100 and forty for U-40. The concentration itself depends entirely on how the vial was reconstituted, which is why two people with identical vials can need completely different draws. If you are mixing the vial yourself, the Peptide Reconstitution Calculator solves for that concentration directly.
U-100 syringes are standard across the US, UK and Europe. U-40 is common in India and in veterinary supply. Confusing them produces a dose off by a factor of two and a half in one direction or the other, which is a serious error with a potent compound. Check the barrel before you draw. For hCG specifically, see the hCG Dosage Calculator, and for dose ranges across every compound, check The Peptide Database.
Divide your dose by the vial concentration to get the volume in millilitres, then multiply by one hundred for a U-100 syringe. Concentration depends on how much water was used to reconstitute, so that has to be known first.
On a U-100 syringe, ten units is 0.1 millilitres. What that delivers in milligrams depends entirely on the concentration of your vial.
No. They vary by standard, U-100 or U-40, and by barrel size, commonly 0.3, 0.5 and 1 millilitre. Smaller barrels have finer graduations and measure small doses more precisely.
A 0.5 millilitre U-100 syringe suits most peptide doses, since its one unit graduations measure small volumes more accurately than a one millilitre barrel marked every two units.
Insulin syringes in the 29 to 31 gauge range with a short needle are typical for subcutaneous use. Always use a new sterile needle for each injection.
